Rubin, who had questioned the quality of the support personnel on hand for the primary day balloting, has been a critic of e-voting for several years. In 2003, he published a study highly critical of the security of the AccuVote TS touch screen voting system, work that led to a book released this past month called Brave New Ballot: The Battle to Safeguard Democracy in the Age of Electronic Voting.

For his part, Radke asserted that some of the allegations in Rubin's 2003 report on the AccuVote TS were "not factual." Among, them he claimed that Rubin had said the TS machines were vulnerable from hacking via the Internet; the machines didn't have Internet connectivity.

Not true, Rubin said today when asked about Radke's charge. "We never said anything about the Internet," he said. "They always say we said it. We never did. They are beating down an argument we didn't make."